Nutritional Contribution of Biofloc within the Diet of Growout and Broodstock of Litopenaeus vannamei, Determined by Stable Isotopes and Fatty Acids

Edén Magaña‐Gallegos Rodrigo González‐Zúñiga Gerard Cuzon Miguel Arevalo Eduardo Pacheco Manuel A. J. Valenzuela Gabriela Gaxiola Elisa Chan‐Vivas Korinthia López‐Aguiar Elsa Noreña‐Barroso

Biofloc production contributes to growth of aquaculture animals through its effect on water quality and as a food source for shrimp. Magaña-Gallegos et al. (2018) used stable isotope and fatty acid analysis to determine the relative contributions of feed sources to shrimp growth and reproduction. Biofloc particle sizes ≥250 𝛍m contributed the most to the growth of shrimp, but artemia, polychaetes, and semi-moist feed were important for shrimp egg production. [Full Article]

Supplementation of Protein Hydrolysates to a Low‐fishmeal Diet Improves Growth and Health Status of Juvenile Olive Flounder, Paralichthys olivaceus

Sanaz Khosravi Hien Thi Dieu Bui Mikaël Herault Vincent Fournier Kyoung‐Duck Kim Bong‐Joo Lee Kang‐Woong Kim Kyeong‐Jun Lee

Protein hydrolysates are considered to be high-quality protein sources for aquaculture, but while previous work has suggested that protein hydrolysates can act as immunostimulants, their immunological effects on important commercial species such as the olive flounder have not been examined. Khosravi et al. (2018) found that several types of protein hydrolysates used as dietary supplements improved growth and health of juvenile olive flounder fed a low fishmeal diet. [Full Article]

Response of Pond‐raised Fingerling Hybrid Catfish, ♀ Ictalurus punctatus ×Ictalurus furcatus, to Dietary Protein Concentrations and Sources

Menghe H. Li David J. Wise Charles C. Mischke Ganesh Kumar Penelope M. Lucas

Feed costs for fingerling fish tend to be greater than those for foodfish due to greater protein requirements. Production studies that include economic analysis provide important information to improve economic returns from fish production. Li et al. (2018) found that it was more economical to produce hybrid catfish fingerlings with a 28% protein diet (as compared to 32% and 35% protein) in spite of the greater feed conversion ratio of the lower protein diet. [Full Article]

Design and Cost Analysis of a Self‐contained Mobile Laboratory for Commercial‐scale Aquatic Species Cryopreservation

William M. Childress Rex H. Caffey Terrence R. Tiersch

Advances in cryopreservation techniques for aquaculture species hold potential for substantial improvements in overall production efficiencies for a number of species. However, widespread adoption is limited by the lack of on-site facilities for high throughput cryopreservation. Childress et al. (2018) designed and analyzed the costs of a self-contained mobile laboratory for commercial-scale cryopreservation of aquatic species. [Full Article]